Tool for manual direction



Nov. 27 1923.

H. B. MAYBERRY TOOL FOR MANUAL DIRECTION Filed Dec. 6, 1922 ATT NEY Toallwhomit may concern:

Nov. 27, 1923.

rais n 'rooL roe MANUAL nrsiicrron.

Application filed December 6, 1922.. Serial No. 605,316.

Be it known that I, HAGAR B. MA BERRY, a citizen of theUnited States,and a resident of Gladstone, county of Somerset, and State of NewJersey, have invented certain new and useful Improvements in Tools forManual Direction, of which the following is a specification.

This invention relates to an improved tool for manual manipulation, andwhile it is applicable to many different uses in metal working,carpentryand the like, it is illustrated and described, for the purpose of clearunderstanding, as used with a hair clipper such as used by barbers.

The object of the invention is to provide such a device which will notnecessitate a stand for an electric motor, but secures the motordirectly to the arm of the person who is directing the tool, and thispermits the use of a short length of flexible shaft or other connectionbetween the motor and the tool.

The invention is illustrated in the accompanying drawing, in whichFigure 1 is a perspective view showing the tool used as a hair clipper.Figure 2 is a front view of the motor. Figure 3 is a side view of themotor. Figure 4 is a detail section of a form of connection between theshaft and motor.

'Figure 5 is a perspective view of a form of bail for the motor, andFigure 6 is a perspective view of the clip of the bail shown in Figure5.

The motor is shown at 10 and can be of any of the usual types of smallelectric motor, and it is adapted to drive any form of tool, and I showin the drawing a hair clipper 11 which is operatively connected with themotor by a suitable connection, usually a flexible shaft 12 and aflexible casing 13 for the shaft. The clipper is an ordinary article ofcommerce and is not described in detail herein, as the invention isapplicable to different kinds of cutters, clippers, and in fact anytool. that is to be manually directed as to the work it is toaccomplish.

It has previously been the custom to have a long length of flexibleshafting driven from a fixedly supported motor, and this lon length ofshafting not only becomes twisted very often, but it makes the operationof an article like a hair clipper uncertain on account of the longlength or weight of shafting tending to pull down on the end of thecutter, and also on account or" the reduced power caused by the lengthof flexible shafting necessary, since many sharp turns very often takenplace in a long length of flexible shafting, andif a short length isused it 'is'necessary to turn the chair in which the person isseated,'instead of the barber going around the person.

' To overcome this'I permit the use of a short length ofjshafting, andto give the fcl ipper more efficiency on account of the sllght loss ofpower in such a substantially straight short length of shafting, Isecure the motor to the arm of the person using the tool by means of asuitable clasp or bail. In the form illustrated I show a bail 14', and'Iusually supply enough flexible shafting so that the motor can besupported adjacent to the elbow, which is the point of most convenienceand where it can be carried with the least amount of effort, and so thatin the movement of the forearm incidental to directing the tool themotor remains substantially aligned with the tool.

In the form shown the bail 14: is fastened over studs 15 on the sides ofthe motor, and for quick adjustment I make the bail of two members, oneof them being a strip of bendable metal, the strip being shown at 16 andhaving a hole 17 at one end by means of which it is attached to one ofthe studs 15 on the motor, and passing at its other end 18 through aclip 19, which clip has its end 20 provided with a hole 21 which issecured over the otherof said studs 15, the clip 19 being usually formedof one piece of metal, which in the form of ears are bent over as at 22,these ears-being flanged at their ends, as at 23, these flanges actingasabutments against which a spring 24; has its ends caught, the spring24: being adaptedto press against the bendable strip 16 to hold it in adusted positions. I prefer to bend the end 18 of the strip 16 over, as at25, to prevent the accidental separation of the parts.

When the motor is to be put on the arm the strip 16 can be pulled outthrough the clip 19 as far as desired and the arm slid in under the bailand over the motor until the motor is in the proper place, and then bygrasping with the other hand and pressing down on the bendable strip 16it is pushed down to grasp the arm as shown in dotted outline at 26 inFigure 2, so that the motor does not sway, but is held substantiallyclose to the arm and is securely fastened. The motor is supplied byeleo-' trical current through a suitable cord or Wire 27. r

I claim:

1. A tool for manual direction comprising an electric motor having meansfor attaching it to the human arm, a tool for grasping by the hand, andan operative connection between the motor and the tool.

2. A tool for manual direction comprising an electric motor, a bail onthe motor, said bail being adapted to clamp the human arm adjacent theelbow, a tool for the hand, and a flexible shaft connecting the motorand the tool. 1

3. A tool for manual direction comprising an electric motor, a bail onthe motor, the bail being formed of abendable strip of metal, and africtional adjusting clip to receive one end of the strip.

4. A tool for manual direction comprising an electric motor having aband for attach- 5. A tool for manual direction comprising an electricmotor, a bail, said bail comprising a strip of bendable metal and alsocomprising a clip formed of metal having ears bent over to form asocket, said ears having flanges at their ends, and a flat spring sprungunder said flanges, said clip receiving one end of said strip so that itfrictionally engages the spring, the other end of the strip and the clipbeing pivotally connected to the sides of the motor.

In testimony that I claim the foregoing, l have hereto set my hand, this4th day of December, 1922.

H. B. MAYBERRY.

